import {z} from 'zod'

export type GetApiPublicSqlV1TopicTableOptions = {baseUrl: string, httpAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const columnType = z.enum(["BOOLEAN", "DOUBLE", "INT", "JSON", "LONG", "STRING", "TIMESTAMP"]);

export const column = z.object({columnName: z.string(), columnType: columnType});

export const columnPerField = z.record(z.string(), z.array(column));

export const topicTable = z.object({tableName: z.string(), clusterSlug: z.string(), topicName: z.string(), fields: columnPerField});

export const getApiPublicSqlV1TopicTableResponse = z.array(topicTable);

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * List of topic tables and their columns
 * 
 * GET /public/sql/v1/topicTable
 */
export const getApiPublicSqlV1TopicTable = async (options: GetApiPublicSqlV1TopicTableOptions) => {
const {baseUrl, fetch: fetchFn = fetch, httpAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (httpAuth !== undefined) headers.set('authorization', `Bearer ${httpAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/public/sql/v1/topicTable${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiPublicSqlV1TopicTableResponse, await res.json())
};